If the young actors starring in "The Queen of the Classroom" were not kpop fans before they filmed the drama, they will be by the time the show's soundtrack is complete. Only a few episodes have passed and the young actors have already met some top kpop stars and even danced with them.

There are quite a few young actors in this drama as it takes place in a classroom. The story focuses on the conflicts between the tyrannical teacher, Ma Yeo Jin, played by Ko Hyun Jung, and her students, who think she is much too mean. The young actors playing the students in Miss Ma's classroom include Kim Sae Ron, Kim Hyang Gi, Cheon Bo Geun and Seo Shin Ae.

Ma Yeo Jin does not think she is being mean. She is just trying to give her students a realistic idea of how difficult life can be. She wants to toughen them up. But will they soften her up?

For music lovers, a more important question may be how many great songs can we hear before either the students or the teacher change.

Girls Generation's Sunny recorded the first song the OST, "Second Drawer." The emotional ballad is the theme for the character of sixth grader Shim Ha Na, played by Kim Hyang Ki. Her ballad expresses the character's complicated feelings.

The second song recorded for the OST resulted in the child actors getting to meet the members of the band SHINee and having the opportunity to dance with them for the music video. The band appeared on the school set and performed with the young actors to the tune of their OST song, "Green Rain." The song, which will serve as the show's ending theme, talks about how much life's hardest lessons can teach you. The lyrics explain how people grow after facing obstacles.

But the song did not inspire thoughtful reflection when it was performed on set. The band's presence made an already lively set even more energetic. The band obviously enjoyed dancing with the child actors and the actors were thrilled to be in a music video. During shooting breaks, the young actors asked to take pictures with the group members, who happily obliged.

Even the adult actors Choi Yoon Young and Ricky Kim, who play teachers, got to join in the fun of the music video. Many OST videos show scenes from the drama but this one, which featured the band and the child actors, was shown at the end of Episode 4. Who else will perform for the OST? The young actors are looking forward to finding out.